Pseudochermes betula

Wu, San-An & Nan, Nan, 2015, Description of the immature stages of Kuwanina betula Wu & Liu, with a discussion of its placement in the Acanthococcidae family group (Hemiptera: Coccoidea), Zootaxa 3926 (4), pp. 576-584 : 579

Key to female instars of Pseudochermes betula .

1 Legs present; antennae with 6 segments................................................ first-instar nymph ( Fig. 1 )

- Fore and middle legs absent, hind legs replaced by pore plates; antennae with 3 segments............................ 2

2 Vulva present; body circular-oval; thoracic dorsum with tubular ducts on medial area; anal ring surrounded by a nearly circular sclerotized plate............................................................................. -adult female

- Vulva absent; body oval; thoracic dorsum without tubular ducts on medial area; anal ring surrounded by an inverted U-shaped sclerotized plate................................................................. second-instar female ( Fig. 3 )

Figures

FIGURE 1. First-instar nymph of Pseudochermes betula (Wu & Liu). Where: A. coeloconic sensillum; B. ventral disc pores; C. hind claw; D. ventral seta; E. frontal tubercle; F. labium; G. dorsal bottle-shaped seta; H. dorsal finely spinose seta.

FIGURE 3. Second-instar nymph of Pseudochermes betula (Wu & Liu). Where: A. antenna; B. small type of macrotubular duct; C. ventral disc pores; D. ventral seta; E. large type of macrotubular duct; F. trilocular pore; G. dorsal disc pores; H. dorsal enlarged seta; I. anal ring and sclerotized plate.